A Re-analysis of Gravitino Dark Matter in the Constrained MSSM

Abstract

We re-consider the gravitino as dark matter in the framework of the Constrained MSSM. We include several recently suggested improvements on: (i) the thermal production of gravitinos, (ii) the calculation of the hadronic spectrum from NLSP decay and (iii) the BBN calculation including stau bound-state effects. In most cases we find an upper bound on the reheating temperature $\treh\lsim {\rm a few}\times 10^7\gev$ from over-production of ${}^6\mathrm{Li}$ from bound state effects. We also find an upper limit on the stau lifetime of $3\times 10^4\sec$, which is nearly an order of magnitude larger than the simple limit $5\times 10^3\sec$ often used to avoid the effect of bound-state catalysis. The bound on $\treh$ is relaxed to $\lsim {\rm a few}\times 10^8\gev$ when we use a more conservative bound on ${}^6\mathrm{Li}/{}^7\mathrm{Li}$, in which case a new region at small stau mass at $\sim 100\gev$ and much longer lifetimes opens up. Such a low stau mass region can be easily tested at the LHC.

18 pages, matches JHEP version

References in corpus (27)

• PYTHIA 6.4 Physics and Manual
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
• micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
• Big-Bang Nucleosynthesis and Gravitino
• Big Bang Nucleosynthesis Constraints on Hadronically and Electromagnetically Decaying Relic Neutral Particles
• Thermal Gravitino Production and Collider Tests of Leptogenesis
• Thermal production of gravitinos
• Particle physics catalysis of thermal Big Bang Nucleosynthesis
• Constraints on the Reheating Temperature in Gravitino Dark Matter Scenarios
• Inflaton Decay in Supergravity
• Bound-State Effects on Light-Element Abundances in Gravitino Dark Matter Scenarios
• Big Bang Nucleosynthesis with Long Lived Charged Massive Particles
• Stau-catalyzed ${}^6$Li Production in Big-Bang Nucleosynthesis
• Bounds on long-lived charged massive particles from Big Bang nucleosynthesis
• Big Bang Nucleosynthesis with Bound States of Long-lived Charged Particles
• The cosmic 6Li and 7Li problems and BBN with long-lived charged massive particles
• Big-Bang Nucleosynthesis with Long-Lived Charged Slepton
• Primordial Lithium Abundance in Catalyzed Big Bang Nucleosynthesis
• Possible solution to the ${}^7$Li problem by the long lived stau
• Implications of Catalyzed BBN in the CMSSM with Gravitino Dark Matter
• The number density of a charged relic
• Constraints on Supersymmetric Models from Catalytic Primordial Nucleosynthesis of Beryllium
• Thermal relic abundances of long-lived staus
• Determining Reheating Temperature at Colliders with Axino or Gravitino Dark Matter
• A note on the primordial abundance of stau NLSPs
• The Gravitino-Stau Scenario after Catalyzed BBN

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• Collapse of Small-Scale Density Perturbations during Preheating in Single Field Inflation
• The Case for an EeV Gravitino
• Axino Cold Dark Matter Revisited
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• Leptogenesis, Gravitino Dark Matter and Entropy Production
• Dark radiation and small-scale structure problems with decaying particles
• Simultaneous enhancement in gamma.gamma, b.b-bar and tau+.tau- rates in the NMSSM with nearly degenerate scalar and pseudoscalar Higgs bosons
• Relating the CMSSM and SUGRA models with GUT scale and Super-GUT scale Supersymmetry Breaking
• Stau relic density at the Big-Bang nucleosynthesis era consistent with the abundance of the light element nuclei in the coannihilation scenario
• New Weak-Scale Physics from SO(10) with High-Scale Supersymmetry
• Disformal Dark Matter
• Inflation and Leptogenesis in High-Scale Supersymmetry
• Cosmology with Long-Lived Charged Massive Particles
• A Model of Metastable EeV Dark Matter
• Big-bang nucleosynthesis with a long-lived charged massive particle including ${}^4$He spallation processes
• Energy-Momentum portal to dark matter and emergent gravity
• Supersymmetric mass spectra for gravitino dark matter with a high reheating temperature
• The degenerate gravitino scenario
• LHC constraints on Gravitino Dark Matter
• Reheating Temperature and Gauge Mediation Models of Supersymmetry Breaking
• Gravitino dark matter and the lithium primordial abundance within a pre-BBN modified expansion
• Natural SUSY at LHC with Right-Sneutrino LSP
• Allowed slepton intergenerational mixing in light of light element abundances
• A Solution to Lithium Problem by Long-Lived Stau
• Analysis of techni-dilaton as a dark matter candidate
• Cosmological evolution of scalar fields and gravitino dark matter in gauge mediation at low reheating temperatures
• The gravitino coupling to broken gauge theories applied to the MSSM
• Revisiting No-Scale Supergravity Inspired Scenarios: Updated Theoretical and Phenomenological Constraints
• An Enhanced Cosmological Li6 Abundance as a Potential Signature of Residual Dark Matter Annihilations
• Gravitino dark matter in hybrid gauge-gravity models
• The curvaton scenario in Brane cosmology: model parameters and their constraints
• Dark matter, mu problem and neutrino mass with gauged R-symmetry